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Title: Materials for the Future Pillar

  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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OSTI Identifier:
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DOE Contract Number:
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Resource Relation:
Conference: REACT Workshop ; 2017-09-25 - 2017-09-25 ; Los Alamos, New Mexico, United States
Country of Publication:
United States

Citation Formats

Hockaday, Mary Yvonne P. Materials for the Future Pillar. United States: N. p., 2017. Web.
Hockaday, Mary Yvonne P. Materials for the Future Pillar. United States.
Hockaday, Mary Yvonne P. 2017. "Materials for the Future Pillar". United States. doi:.
title = {Materials for the Future Pillar},
author = {Hockaday, Mary Yvonne P.},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 9

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  • Many accepted and useful methods have been developed and used for pillar design. Each method has its own particular strengths and weaknesses. Three methods addressed in this paper are; empirical, analytical, and numerical. Each of these methods have their place in pillar design. Analytical methods result in close approximation of the ideal pillar (most economical, stable, or yielding) and are suitable for use in final mine design and in analyzing existing problems. Boyd uses the analytical method to develop site specific mine pillars design equations. An analytical method, one of many developed by Boyd, is presented here and is basedmore » on the procedure used by Wilson and others in development of their empirical equations.« less
  • The sudden, violent collapse of large areas of room-and-pillar mines poses a special hazard to miners and mine operators. This type of failure, termed a {open_quotes}Cascading Pillar Failure{close_quotes} (CPF), occurs when one pillar in a mine layout fails transfering its load to neighboring pillars causing them to fail, and so forth. Recent examples of this kind of failure in coal, metal and nonmetal mines in the U.S. are documented. Mining engineers can limit the danger posed by these failures through improved mine design practices. Whether failure occurs in a slow, nonviolent manner or in a rapid, violent manner is governedmore » by the local mine stiffness stability criterion. This stability criterion is used as the basis for three design approaches to control cascading pillar failure in room-and-pillar mines, namely, the containment approach, the prevention approach, and the full extraction mining approach. These design approaches are illustrated with practical examples for coal mining.« less
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  • This volume contains a sampling of the papers presented at the Cements Division meeting at the 95th Annual Meeting and Exposition of the American Ceramic Society, held in Cincinnati, Ohio, April 18-22, 1993. The meeting brought together a group of scientists and engineers who are actively working on industrial, applied, basic, and environmental issues related to cement-based material. Sixteen papers are included in this volume. Topics include optimization of the chemical composition and preparation of cements, mechanical properties of cements, and responses to the environmental effects of cements.